15 moments to inspire you to stay outside after sunset

Celebrate the beautiful moments in nature that only occur after the sun goes down.

This year, Earth Hour doesn't have to be an hour of darkness. The World Wildlife Fund's "lights out" campaign is just as much about reducing greenhouse gases as it is about appreciating the world we live in and motivating one another to care more about it.

So when the sun is gone, go outside. Revel in the fading light and enjoy the sounds of nature — rustling leaves, chatting frogs, maybe even a cricket or two. If the stars are out, enjoy the view free of light pollution. And if the thought alone doesn't quite push you out the door, perhaps some of these amazing photos will offer some motivation: